Talking about ignorance, i and other professionals made measurments on Tekway/Hantek and didn't found anything what you found.

For the last time, I can only review stuff as I see it in front of me.Do you forgot that you publicly stated that I was right and people have seen this issue on certain revision numbers etc?

The way people conveniently forget public verifiable facts staggers me every day.

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Sure, there was for some time big batch of products with worse response when they got hacked, but clearly not on untouched devices.The unit you had was broken or not calibrated. I know how fucking stupid Hantek/Tekway (or who ever is the person sending replacement mainboards ..

This unit was NOT hacked, it was a direct factory replacement.I did run the internal calibration procedure to verify that wasn't it.What more was I supposed to do?

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Talking about one-off issues, well, maybe the Rigol PSU you tested have does have such one-off issue, but honestly, as long not prooved i and other can rant on it (exactly as you did on other one-off things). Few µs 4V peak is no go for me, as i said, nobody knows it there are no other issues/peaks.

This unit was NOT hacked, it was a direct factory replacement.I did run the internal calibration procedure to verify that wasn't it.What more was I supposed to do?

Maybe you are supposed to fix your factory new gear. If it's cheap just thing of ebay, you should treat it as faulty and start designing the board properly, better spec parts, complete layout overhaul. Design factory testing for it to identify faulty units, better quality control.

It seems you don't have tolerance to negative feedback, i know people like that. They ask for feedback, but once you criticize their work, they go berserk on you.

And lets's get another thing straight - you have accused me of being paid by Rigol to give positive review.That is NOT negative feedback, it is probably the worst accusation you can make against a reviewer.

Now, what should I do about this?

If I was smart I simply would have banned your arse a long time ago and the problem would have vanished, poof. That's what many other reviewers would have done.

I could simply ignore you as just another kook or overenthusiastic fanboy, as many reviewers do.

If I was dumb I'd spend my night (sick, away from my family) trying to explain to you on youtube and the forum, why your accusation is unfounded.But I'm not dumb, I care about slanderous accusations, so I respond to them.I'm even helping you, because making such unfounded accusations against the evidence may just get you into trouble one day, perhaps even sued for libel (not by me).

I have asked you to explain why, if I am paid off my Rigol, do I put potentially negative stuff in the reviews?I have asked you to explain why, virtually all the evidence points towards my not being paid off. I find something negative to say about everything, that's just my nature.I'll also ask, if I'm being paid off by Rigol, why I have not bothered giving a full review of the DS2000, DSA815, and DG4000 (which they gave to me for free) yet after all this time? Wouldn't that be a priority for me?

Because you refuse to answer these things, it is becoming quite evident that you are nothing but a Tekway fanboy, and you got pissed off that I gave your precious Tekway scope the thumbs down (which by the way almost every but I few people (and Charles) agree with me on). So you try to justify your position me accusing me of things, and them conveniently ignore the fact when they are presented to you that would serious hurt your accusation.There is a psychology term for this, I'll leave it to your to look it up, because I forget, and I'm tired....

So which is more likely:You are just p'ed off viewer who has a grude, and invented some delusional claim against which you will refuse to even think is wrong, and you dig in deeper as your claims are called out.Or I'm secretly paid of by *insert name here*, a complete IDIOT, AND the facts just conveniently happen to go my way?

BTW, I bought this PSU with my own money, as I did the Rigol 1052E. Yes, I might be a big supporter of the 1052E (use fanboy if you want), but only because it has proven itself. And most in the industry seem to agree with me. As they did for the Tekway. How convenient for me huh?

Confirmation bias. I see it as a personality indicator when faced a cognitive dissonance sort of situation. Bad facts don't fit in with my current facts, brain must resolve...REJECT! Good facts fit in with my current facts...ACCEPT!

Sure, nobody is asking for more, all you can do is check/test what in front of you. When there are issues you might (or might not) call manufacturer (or who else provided it) to get answer or replacement (or nothing, which is as well an answer). You can as well call other customers of that particular object-of-discussion to double check, but on the other side this happens automatically (everybody who can will double check own unit for x or y issue, only lazy idiot would ignore problems).

This are your reviews, so your opinion is what counts (during and immediately after review). Any other (later) comments from others are important as well, but only when they really important (double checked item/result related and not only blah blah blah or what so ever rant). Follow-ups (from you or other qualified testers) are of course important as well.

This unit was NOT hacked, it was a direct factory replacement.I did run the internal calibration procedure to verify that wasn't it.What more was I supposed to do?

well, Tekway/Hantek haven't provided any replacement, Charles as well. So this was all you could do. Everything else was done by other users (and this is why i said "ignorance").

That DSO hardware is using lot of techs what need to be calibrated. There is e.g. table (actually set of text files/tables) which contains factory cal information. This can NOT* be restored/run/created by enduser. The self calibration is taking values from factory cal tables, so when they already fucked up, the resulting self cal will be fucked up as well. Both manufacturer don't want to provide informations how the factory cal need be executed (and exactly necessary/where to measure), not even to large distributor (or better said his cal lab) under NDA.

What Charles got was a replacement board. All he was capable to do was to insert that board and run self-cal, nothing else. When there was something wrong in factory cal, Charles** was not able to fix it. Sure, there is a way to check the whole DSO, but honestly when asking for replacement you would expect that the manufacturer know what to do and what to provide. And that's the problem here. I can't speak for others, but almost every time i asked for replacement, i got DOA or not calibrated boards. No idea if this issue has been fixed, i can only speak from what i observed between 2009 and 2012.

I will see, when i got some spare time, i will "destroy" the factory cal and make some screenshots showing what kind of wired results the DSO is showing without or with wrong cal. Charles probably run some simply tests, which is of course all he have to do because the manufacturer have to provide working repalcement board, and after he saw waveforms jumping on the screen he released for sell that unit back as "working".

* I have reversed their procedure as far i was able to do, one thing (non linearity of frontend part) is still not reversed (but at least Hantek told me what the unknown params means, and here to look for it). As long no physical changes done to frontend, the factory cal procedure i published can be used to restore DSO. This, together with the schematics i drawn and posted was even enought to build own DSO clone based on the information provided by me. If there is someone, except the few engineers on manufacturer side, in the worlds knowing these DSO then me. I'm not a fanboy, i spend as well lot of time on other DSO in the same price range (Rigol, Siglent, Tonghui, UNI-T), not only for testing but as well reversing of hardware and software. If there was something ugly, i always asked manufacturer first to fix - when no response or taken too long - i published my "comments"/rants and possible solutions.

** i don't now Charles and what he is doing (or not), but as said above, nobody is expecting not working replacement parts. sure, DOA due transport damage, but that's all. Hanek/Tekway however, as many other chinese manufacturers as well, have problems to understand what QC means. If you wan't to know more about specific manufatcurer, check their website. If there are boken links, they you know all you need to know. Typos or chinglish are OK, that didn't means anything about quality, but broken links are no go.

Talking about one-off issues, well, maybe the Rigol PSU you tested have does have such one-off issue, but honestly, as long not prooved i and other can rant on it (exactly as you did on other one-off things). Few µs 4V peak is no go for me, as i said, nobody knows it there are no other issues/peaks.

And that's why I showed it!

and this is exactly what we all expect, if there is something, show it!

Logged

I don't want to be human! I want to see gamma rays, I want to hear X-rays, and I want to smell dark matter ... I want to reach out with something other than these prehensile paws and feel the solar wind of a supernova flowing over me.

Dave,Thanks for I highlighting the problem with the 832, I’ve got exactly the same spike/pulses on my 832. I did some power-on test when I first got the PSU (a couple months back) and I was convinced the 2V 250ms pulse on Chan 1 only appeared without any Load, so I didn’t post anything here to cause mass hysteria (sorry). Now redoing the test, it seems pulse will occur even with a 10 ohms on the output (it does on my 832 anyway). I think used a higher value resister last time, so I’m not sure why I’m seeing a worse result now. On Chan 2 I get the small negative pulse as well as the Spike, but I’m pretty sure I didn’t see that spike initially. I probably just didn’t run the test enough times. I’m going contact Rigol tech support, but I’m sure you’ll get an answer quicker than me.

You would think that people would have a little respect for Dave since he is providing the FREE venue for them to voice their opinions. They don't have to agree with everything he says but at least honor the position of captain of the ship. If you don't like Dave's content or style STOP WATCHING. If you keep watching and whining it proves something about your motivation.

Citizen

Dude, calm down..." banned your arse a long time ago and the problem would have vanished"-no it wouldn't, banning people is big mistake, it will make more "enemies" who could probably create new account and spread rumors about you banning people...."If I was dumb I'd spend my night (sick, away from my family) trying to explain to you on youtube and the forum, why your accusation is unfounded."-sorry,but that is what you are doing right now. I just left this discussions because it will lead it to nowhere.Too much fanboys here, and to much nerves from your side.

"I'm even helping you"-wow, that is very kindhearted, i appreciate it.

" ...I put potentially negative stuff in the reviews?"-I answered this question, to make it look genuine. " have not bothered giving a full review of the DS2000, DSA815, and DG4000"-commercial videos aren't your top priority, you may produce lots of other videos, and from time to time make some advertisement. That what i would do, if i had a popular videoblog. This will maintain equilibrium between interesting content and obvious advertisement.

And no,i am not Teway fanboy, i just find you Tekway review very unfair towards it, because your unit was somewhat uncalibrated or broken( my unit doesn't show any errors you found).And we all know that you have good influence on the product success.(I bet hundreds of Rigol 1052 was bought after viewing your review/website )I judge your videos like you judge the test gear.One flaw and you call it shit. (Also similar to this FG with rust, where you gave it almost thumb down, even without testing its functionality)

" p'ed off viewer"-no, i am just the viewer who watch your videos without switching off my personal opinion, unlike many of your fanboys, who give you thumbs up even without viewing the video, who give any subjective but negative comments thumbs down or mark it as spam on default.It is clear that for many users you become an idol (like Apple), and they will swallow everything you tell them....

You would think that people would have a little respect for Dave since he is providing the FREE venue for them to voice their opinions. They don't have to agree with everything he says but at least honor the position of captain of the ship.

I wouldn't even go that far. Don't "honor" me, fact check me!I'm always open to correction and will always admit when I'm wrong, or will change my mind when presented with a sufficient case.I think I'm pretty generous and will tolerate most feedback (you have to be in this business, otherwise you'll do a "photonic induction"), all I ask is that the feedback is not abusive, and you don't make accusations without evidence.I'm a straight up dude, very often to my detriment My first ever job reference read (unsurprisingly now, but was a shock to a young kid who didn't see anything wrong with just saying what he thought)

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"Dave sometimes lacks tact. But this is due to enthusiasm and not rudeness"

I would like it made crystal clear right at the start of every video review/impressions, the circumstances behind the choice of equipment to review. Is it a private purchase, loan or gift? Dave mostly does that. I suspect that he doesn't have the intention to polish a turd when he starts recording, he therefore doesn't stop to think that such disclosure is necessary.

Correct, that simply never occurs to me. It's stated on my website, but not in the individual videos.To me that's too formal, and possibly just leads to controversy where there otherwise may not be any. i.e. when people hear that I got the unit for free, they may become immediately suspicious instead of always critically analysing every review based on it's merits.

" banned your arse a long time ago and the problem would have vanished"-no it wouldn't, banning people is big mistake, it will make more "enemies" who could probably create new account and spread rumors about you banning people....

Nope, it's trivial to continue to ban people. It works.

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" ...I put potentially negative stuff in the reviews?"-I answered this question, to make it look genuine. " have not bothered giving a full review of the DS2000, DSA815, and DG4000"-commercial videos aren't your top priority, you may produce lots of other videos, and from time to time make some advertisement. That what i would do, if i had a popular videoblog. This will maintain equilibrium between interesting content and obvious advertisement.

By that I sense that you are still of the firm belief that Rigol are paying me to give favorable reviews?

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And no,i am not Teway fanboy, i just find you Tekway review very unfair towards it, because your unit was somewhat uncalibrated or broken( my unit doesn't show any errors you found).And we all know that you have good influence on the product success.(I bet hundreds of Rigol 1052 was bought after viewing your review/website )I judge your videos like you judge the test gear.One flaw and you call it shit. (Also similar to this FG with rust, where you gave it almost thumb down, even without testing its functionality)

You would think that people would have a little respect for Dave since he is providing the FREE venue for them to voice their opinions. They don't have to agree with everything he says but at least honor the position of captain of the ship.

I wouldn't even go that far. Don't "honor" me, fact check me!

I didn't mean don't question Dave, I just meant you can be questioned in a less arrogant, less combative, more respectful way.

I don't understand what Citizen and tinhead are complaining about. I like Dave's reviews, and I find that they line up quite well to my own experiences. I pay close attention when Dave is pushing buttons to see if he does anything wrong; once in a while a solution to a problem he's mentioning is clear to me but not to him, but that's just an everyday normal difference between two folks with different skillsets.

Tinhead and Citizen are welcome to produce their own review videos; I'd gladly watch both.

I don't understand why there is hostility at all. It's pointless. No one is going to change any conspiracy theorists' minds. It simply cannot be done, and the more you try, the more you're in on the conspiracy. Ignore the haters, Dave. You're not doing this vblog for them.

Dude, calm down..." banned your arse a long time ago and the problem would have vanished"-no it wouldn't, banning people is big mistake, it will make more "enemies" who could probably create new account and spread rumors about you banning people...."If I was dumb I'd spend my night (sick, away from my family) trying to explain to you on youtube and the forum, why your accusation is unfounded."-sorry,but that is what you are doing right now. I just left this discussions because it will lead it to nowhere.Too much fanboys here, and to much nerves from your side.

That's why it's dumb to have such discussions.

Banning people from forum works, to get rid of the problem at that forum. Sure it would pop up on other communities, but it resolves it here.Sure you can create new accounts, but it's the one with the longest breath. A forum mod/admin can easily push the button "BAN THAT SHIT". An individual has to make a lot of effort to create new accounts (e-mail bans, IP bans, etc.)

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" ...I put potentially negative stuff in the reviews?"-I answered this question, to make it look genuine. " have not bothered giving a full review of the DS2000, DSA815, and DG4000"-commercial videos aren't your top priority, you may produce lots of other videos, and from time to time make some advertisement. That what i would do, if i had a popular videoblog. This will maintain equilibrium between interesting content and obvious advertisement.

And no,i am not Teway fanboy, i just find you Tekway review very unfair towards it, because your unit was somewhat uncalibrated or broken( my unit doesn't show any errors you found).And we all know that you have good influence on the product success.(I bet hundreds of Rigol 1052 was bought after viewing your review/website )I judge your videos like you judge the test gear.One flaw and you call it shit. (Also similar to this FG with rust, where you gave it almost thumb down, even without testing its functionality

Have you ever wandered around one of those computer components unboxing channels, like Linustechtips or NCIX? They get stuff sent from almost every manufacturer (the one's don't are usually are bit retarded). It's clear of any manufacturer that they get samples to show off, which in essence is a form of marketing/advertisement/sales boost. Therefor in essence you can call every review/product video an advertisement.

In some cases these engineering samples have been reviewed and issues have been pointed out that were specific to that engineering sample. That's their right to do so, I would even say their duty. If one would contact a manufacturer about a problem , and they get told to leave that bit out and listen, then that's really really bad. Historically Dave has used product video's to address certain issues and even got a direct response back. (Microchip PICKIT3 video, Fluke 87V GSM issues)

Moreover, if you look around on this forum there are strong threads going about Rigol equipment (and other) being hacked to get the software upgrades for free. I'm sure that once someone figures it out for this PSU, they will post it here. If a manufacturer bought themselves into a website/community, then they wouldn't allow threads where their products are being reverse engineered..

However, why do I watch reviews and product video's? In many cases not for the opinion of the reviewer but primarily to check out products and make my own judgements about the product.I very often read/watch reviews of products and cross out points they make. "This harddrive is rather slow" - don't care, I only play movies from it. "The harddrive is ultrafast!" - jolly, but I only play movies from it... "This mouse is really sensitive yet very accurate" - NICE I hate a slow and inpredictable mouse .

I am going to say for the very first time that I'm OK with the software "crippling". It is astoundingly full-featured for a power supply even without the additional features. I'd be willing to pay a bit more for the extra stuff.

Off to perform my penance with an analog PSU now...

Logged

No longer active here - try the IRC channel if you just can't be without me

I just meant Dave can be questioned in a less arrogant, less combative, more respectful way.

ahh, you know what, this is not that simple. Dave likes to "explode", ask Altium. I know how hard can be to be "such person", i'm like that as well. Some call that "driven by emotion", but i would say this is not the case (hehe, not always). Sometime it is so easy to be pissed off by almost nothing, and it is hard to see own errors as well. Sometimes it is hard to imagine/accept that the person on the other side is such stupid or blind or "lost cause", really hard to continue discussion. I was working for years for big US customers, where almost everythig was driven by profit (or better said by clueless VPs with small dicks) and tons of useless PP presentations ^^. I never signed any ethics policy, and will never do it ^^. My ass belongs to me. The problem here is however that it is sometimes hard to differ if the person on the other side is really dumb or right (and i'm "blind").

Check that : Citizen said "i do have X, and don't see error Y", Dave's answer on that "You are a lost cause. I am wasting my breath". I believe Citizen, i know that DSO good and can confirm what he saw/measured, i believe Dave as well - i know/can confirm how these DSO "perfoms" when they not ok (on hardware or/and factory cal side). Both are right, but who was here arrogant? Dave will probably say "but i know what i saw", right he knows, and i know it as well. But exact the same case for Citizen. Let's continue ...

Dave said "fact check me! I'm always open to correction" - so far everything ok - " and will always admit when I'm wrong". And that's the problem, Citizen said "Dave you wrong" but Dave still answering "You are a lost cause. I am wasting my breath". Now one can ask why? The answer is simple, check exactly what Dave said "when I'm wrong" !! But he was not, he said about Tekway DSO exactly what he observed. And Citizen what he observed. And i can confirm both observation!!.

So where is the problem again? Right, beeing arrogant and ignoring other ppl observation. And this is not Dave only, Citizen as well haven't accepted what Dave observer. And i did call Dave as well xxx without reading at least twice what he exactly said. Such situation might cause some ppl to think that Dave was paid to say X or Y (now let's ignore the fact that he runs video blog and is being paid therefore, because that didn't means anything. An "Expert witness" is being paid by Court as well and nobody - except the defendant hehe - have problmes to accept this situation).

So what no? Nothing, let's continue watchig Dave's rants, ehm i mean reviews I don't expect from Dave videos like these from w2aew (always pleasure to watch them), Dave style is completely different. Even if he sometimes wrong (and f* arrogant, hehe), they are at least authentic (something which is hard to find in the PP/VPs small dicks driven world) and not that bad from informational/technical point of view. Such combination is unique.

Logged

I don't want to be human! I want to see gamma rays, I want to hear X-rays, and I want to smell dark matter ... I want to reach out with something other than these prehensile paws and feel the solar wind of a supernova flowing over me.

i hate to pay too much, crippling means cost reducing (not always, but for sure when we talk about Rigol stuff) and lower price for us!

Logged

I don't want to be human! I want to see gamma rays, I want to hear X-rays, and I want to smell dark matter ... I want to reach out with something other than these prehensile paws and feel the solar wind of a supernova flowing over me.

Citizen

:palm:Daves fanatics in action:) Just suddenly got 4 Thumbs downs on each of my FPGA tutorial videos. Told you, for most fans here Dave is like an Idol ( a god, an Iphone etc) they will be aggressive to anyone who criticize or questions Idols credibility. I wonder what will happen if Dave will say:"Find this Citizen in real world". I would probably be waked up in the night by crazy mob with torches:)

i hate to pay too much, crippling means cost reducing (not always, but for sure when we talk about Rigol stuff) and lower price for us!

But it's a big risk for Rigol to take.Generally, if you soft cripple your product, you can bet someone will come along and un-cripple it for you.Look at what happened with IDE RAID controllers in the early days, Promise Technology crippled certain devices simply with software. A hack arrived to un-cripple it. In the end, Promise put the silicon through several redesigns to try and stop the hack.